TEST MODE
1. How to Activate CD Test Mode2. How to Cancel CD Test Mode
Insert the AC plug while pressing the function CD button.Either one of the following operations will cancel the CD test
FL display tubes will show the Ostart mode� displaymode.
(repeating the indications OTEST� and O00 00 00�Y Press the function button.Y Press the power switch button.
alternately), and the test mode will be activated.(except CD function button) Y Disconnect the AC plug
3. Description of the CD Test Mode Functions
When test mode is activated, the following mode functions from No. 1 to No. 4 can be used by pressing the operation keys.
[Values of Focus Balance, Tracking Balance and Tracking Gain]
The displayed contents show the actual value after flashing three times.
Mode/No.Operation FL dispalyOperationContents
Start modeActivation Start mode Y Test mode is activated.Y Automatic adjustment value
No.1dispalyY CD block power is ON.
Search mode keyY Laser diode turns always ON.Y APC circuit check
O OY Continual focus searchY Laser current measurement
(The pickup lens repeats the full-(Laser current control. Across a
swing up-down motion.)resistor connected between emitter
* Avoid continual searches that last forand GND.)
more than 10 minutes.FOCUS SERVO
Y Check focus search waveform
Y Check focus error waveform
(FOK/FZC are not monitored in the
No.2* NOTE 1search mode)
Play mode keyNormal displayY Normal playbackFOCUS SERVO/TRACKING SERVO
CLV SERVO/SLED SERVO
No.3Check DRF
Sled mode keyStart mode Y Pickup moves to the outermost trackSLED SERVO
displayY Pickup moves to the innermost trackCheck SLED mechanism operation
* NOTE 2
(During playback, machine operates
No.4normally.)
* NOTE 1: There are cases when the tracking servo cannot be locked owing to the protection circuit being operated when heat builds up
in the driver IC if the focus search is operated continually for more than 10 minutes. In these cases the power supply should be
switched off for 10 minutes until heat has been reduced and then re-started.
* NOTE 2: When pressing the or keys, take care to avoid damage to the gears. Because the sled motor is activated when the or
keys are pressed, even when the pick-up is at the outermost or innermost track.
* NOTE 3: The machine cannot enter the traverse mode even though the PAUSE button is pressed during PLAY. It enters the normal
PAUSE state.
4. Operation Outline
The operation of each mode is carried out in the direction of the arrows from the start mode as indicated in the following illustration.
No. 2No. 3
Search modePlay mode
No. 1
Start mode
(All FLs light up.)
No. 4
Sled mode
If the DISC DIRECT PLAY button is pressed, the machine performs the same operation as the PLAY button is pressed as shown. If
the tray is opened by pressing OPEN/CLOSE button during Play mode or Traverse mode, the machine returns to the Start mode.
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